SC3105
Features
Multi-Mode Operation
125KHz max frequency mode in Peak Load
mode
65KHz fix frequency in Full Load mode
Valley switching operation in Green mode
Burst Mode in Light Load & No Load mode
Peak power delivery for peak load
Tighten and programmable output over
current protection
Soft Startup
Built-in Jittering Frequency
Cycle-by-Cycle current limiting
VDD Under Voltage Lockout with Hysteresis
VDD Over Voltage Protection (VDD_OVP)
Output Over Voltage Protection(OVP)
Output Over Current Protection (OCP)
Over load Protection (OLP)
Over Temperature Protection (OTP)
+500mA/-800mA Driving Capability
Applications
Offline AC/DC flyback converter for
AC/DC Adapter
PK Load Application
Open-frame SMPS
Description
SC3105 is a high performance AC/DC power
supply controller which use advanced control
technology to build peak current mode PWM
flyback power supplies. When the load is pretty
light, the device operates in ‘burst mode’ to
minimize the standby power loss. The device
operates in green mode and quasi-resonant
mode at low and medium loading. At full loading,
the device operates in fixed frequency mode. As a
result, these different operating mode keeps high
efficiency in the whole loading range.
The ultra-low operating current at light load
ensures that the SC3105 is ideal for applications
targeting the newest regulatory standards for
average efficiency and standby power.
The SC3105 is designed especially for low power
purpose, fruitful protection such as
Cycle-by-Cycle current limiting, output over
current protection (OCP)，over load protection
(OLP), VDD under voltage lockout (UVLO), VDD
over voltage protection (VDD_OVP) , internal
over temperature protection (INT_OTP), external
over temperature protection (EXT_OTP), output
over voltage protection (OVP) and short circuit
protection (SCP).
